G 3500 1 Ton Van V8-350 5.7L VIN K TBI (1987)
Figure No. 1. The reverse rotation water pump has the same appearance as a "same direction" water pump, See Figure No. 2.
When servicing 1987 water pumps on tracks with serpentine belt drives, care must be taken to use only the part specified in the parts book. The usage of
the incorrect water pump can cause engine overheat and possible engine damage
The water pumps can be identified by using the following information:
4.3L, 5.0L, 5.7L REVERSE ROTATION WATER PUMPS do not have bracket mounting bosses on the top of the pump housing. The pump casting
number is 14102026.
4.3L, 5.0L, 5.7L SAME DIRECTION WATER PUMPS have bracket mounting bosses on the top of the pump housing. The pump casting number is
376444.
2.8L REVERSE ROTATION WATER PUMPS have three bolt attachments on the bottom of the pump housing.
2.8L SAME DIRECTION WATER PUMPS have four bolt attachments on the bottom of the pump housing.
